<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
</head>
<body>
    <script>
        function Fn(){
           function hello(){
            console.log(1);
            }
        }
        Fn.prototype.test=function(){
            console.log('skj');
        }
        // console.log(Fn);
        console.log(Fn.prototype);
        console.log(Fn.prototype.constructor===fn);
        var fn=new Fn()
        fn.test();
        console.log(fn.__proto__);
        console.log(fn.__proto__===Fn.prototype);



        
    </script>
</body>
</html>